High Activity Hydrogen Evolution Catalysis by Uniquely Designed Amorphous/Metal Interface of Core–shell Phosphosulfide/N-Doped CNTs

Dong Jun Li, Joonhee Kang, Ho Jin Lee, Dong Sung Choi, Sung Hwan Koo, Byungchan Han, Sang Ouk Kim

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A cost effective hydrogen evolution reaction (HER) catalyst that does not use precious metallic elements is a crucial demand for environment-benign energy production. The family of earth-abundant transition metal compounds of nitrides, carbides, chalcogenides, and phosphides is one of the promising candidates for such a purpose, particularly in acidic conditions. However, its catalytic performance is still needed to be enhanced through novel material designs and crystalline engineering. Herein, a chemically and electronically coupled transition metal phosphosulfide/N-doped carbon nanotubes (NCNT) hybrid electrocatalyst is fabricated via a two-step synthesis. The uniquely designed synthesis leads to the material morphology featuring a core–shell structure, in which the crystalline metal phosphide core is surrounded by an amorphous phosphosulfide nanoshell. Notably, due to the favorable modification of chemical composition and surface properties, core–shell CoP@PS/NCNT exhibits the noticeable HER activity of approximately −80 mV @ −10 mA cm−2 with excellent durability, which is one of the highest active nonnoble metal electrocatalysts ever reported thus far.

Original languageEnglish
Article number1702806
JournalAdvanced Energy Materials
Volume8
Issue number13
DOIs
Publication statusPublished - 2018 May 4

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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